I am new to CNC and have recently purchased a Sainsmart laser. The information I have says it is a stb5100 controller. The laser came with software that is difficult for me to use, but the controller connects to my computer. I downloaded Lightburn and am excited by its apparent ease of use. However, it will not connect to my laser. I have tried to automatically connect, and manually connect with a variety of combinations of options of ports and language combinations, with no success.
That is a Mach3 compatible USB motion card, but I’ve never seen it before - I can tell you it’s very unlikely to be compatible with LightBurn. SainSmart usually sells the GRBL controller with units for laser use - that controller is compatible with LightBurn.